Ammonium trithiothiotungstate [(NH₄)₂WOS₃] is an important thiometallic ammonium salt. After thermal decomposition, transition metal chalcogenide tungsten disulfide WS₂ can be obtained. At the activity center of biological nitrogenase, the synthesis of tungsten iron sulfur cluster compounds, semiconductors, superconductors, photochemical solar cells, storage batteries, lubricants and electrochemical reactions. Chemical sensors, nanomaterials, supercapacitors, new generation transistors, hydrogen storage materials and electrode materials have good applications.

Tungsten disulfide and molybdenum disulfide are typical sandwich layered structures. Because of their relatively weak van der Waals force between layers, tungsten disulfide can also be peeled into single or few layers of nanosheets. It is considered to be another important two-dimensional nanosheet material with unique physical, chemical and electrical properties. However, it is difficult to prepare pure tungsten sulfide nanomaterials with single layer structure in general chemical and physical methods.

Spherical powders have special properties which can not be replaced by ordinary powders, such as good fluidity and high bulk density. Therefore, spherical powders are widely used in thermal spraying, injection molding and gel casting. Because of its high temperature, high enthalpy, high chemical reactivity, controllable reaction atmosphere and temperature, plasma has shown unique advantages in the synthesis and spheroidization of powders and attracted people's attention.

The Similarities Between WEDM-HS, WEDM-LS and WEDM-MS

WEDM-HS, WEDM-LS and WEDM-MS all refer to - EDM machine - a CNC machine tool that can remove metal and complete workpiece cutting tasks. The full name of the electric discharge wire cutting machine Wire-cut Electrical Discharge Machining，English abbreviation is WEDM. From another point of view, it can also be said that the WEDM-HS, the WEDM-MS, the WEDM-LS are all metal wire and metal discharge corrosion processing.

The old driver said that this transparent car insulation film, which you may not know, is a tungsten oxide transparent car insulation film. Although, at present, there are many kinds of car films on the market, such as 3M, Weigu, Ray-Ban, etc...

Tungsten and molybdenum are similar elements, and their physical and chemical properties are very similar. Tungsten minerals are all associated with molybdenum, but the content is different. With the depletion of high-grade tungsten resources, low-grade tungsten resources and secondary tungsten resources have become more and more important tungsten metallurgical raw materials. The molybdenum ion concentration in calcium tungstate solution produced from these raw materials is also increasing. In order to produce pure tungsten compounds, it is necessary to remove molybdenum completely and efficiently from calcium tungstate solution.

Tungsten oxide is a typical transition metal oxide, and nano-tungsten oxide is a new type of functional material. Due to its excellent discoloration performance, it is used in smart windows, large-area flat panel displays, gas sensors, dye-sensitized solar cells, and automatic There are a lot of potential applications in many new fields, such as rearview mirrors and energy storage devices.

Wear has become one of the main reasons for the failure of modern industrial machinery parts. With the development of industry, more and more high wear-resistant materials are required, and wear-resistant coatings have become the standard of most important wear-prone materials.

Tunsten trioxide is a metal oxide semiconductor. It is a surface conductance (resistance) controlled gas sensitive material. The atomic properties of WO₃ crystal surface are active and it is easy to adsorb gas molecules. When gas molecules adsorb on the crystal surface, the carrier concentration inside the WO₃ crystal will change correspondingly, which shows the change of sensor resistance. Because the active atoms of tungsten oxide are located on the surface of the crystal, the contact area between the crystal surface and gas is greatly enlarged, which can effectively improve the gas sensing performance. It can be used in indoor environment detector, air purifier assembly, dangerous gas alarm device and so on.

At present, the coarse separation of scheelite is usually by gravity separation or flotation. Because scheelite is a kind of ore which is easy to be gravity-dressed, but because scheelite has fine dissemination size, it needs to be grinded to 0.2 mm before the basic monomer dissociation, thus increasing the difficulty of gravity recovery, and the recovery rate of gravity-dressing is low, the taste of scheelite in crude concentrate is not high.